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WO2012093671A1 - Dispositif el organique et procédé de fabrication de dispositif el organique - Google Patents

Dispositif el organique et procédé de fabrication de dispositif el organique Download PDF

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Publication number
WO2012093671A1
WO2012093671A1 PCT/JP2012/050024 JP2012050024W WO2012093671A1 WO 2012093671 A1 WO2012093671 A1 WO 2012093671A1 JP 2012050024 W JP2012050024 W JP 2012050024W WO 2012093671 A1 WO2012093671 A1 WO 2012093671A1
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WIPO (PCT)
Prior art keywords
unit
organic
electrode layer
series connection
separation groove
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PCT/JP2012/050024
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English (en)
Japanese (ja)
Inventor
明 西川
秀 鮎川
英雄 山岸
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Kaneka Corp
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Kaneka Corp
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Priority to JP2012551863A priority Critical patent/JP6000127B2/ja
Priority to US13/978,387 priority patent/US8921846B2/en
Priority to EP12732156.0A priority patent/EP2663163B1/fr
Publication of WO2012093671A1 publication Critical patent/WO2012093671A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/42—Antiparallel configurations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/84—Parallel electrical configurations of multiple OLEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/86—Series electrical configurations of multiple OLEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/841—Applying alternating current [AC] during manufacturing or treatment

Definitions

  • the present invention relates to an organic EL device and a method for manufacturing the organic EL device.
  • the present invention relates to an organic EL device that can emit light using alternating current, and can simplify the device.
  • an organic EL (Electro Luminescence) device As a next-generation lighting device, an organic EL (Electro Luminescence) device has attracted attention, and many studies have been made.
  • the organic EL device is obtained by laminating an organic EL element composed of an organic compound or the like on a glass substrate or a transparent resin film base material.
  • An organic EL element is a light emitting element in which an organic light emitting layer is provided between an anode and a cathode.
  • the organic light emitting layer includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like.
  • An organic EL device is essentially a device that emits light by applying a DC voltage. That is, the organic EL element has a coupling portion of a P-type semiconductor and an N-type semiconductor, and the organic EL element is a device having diode characteristics. For this reason, the organic EL element has polarity as described above, and emits light only when power is supplied so that the P-type semiconductor side is positive and the N-type semiconductor side is negative. Therefore, when a commercial AC voltage is applied to the organic EL element, the light is turned on in the half cycle that is the forward voltage, and the light is turned off during the remaining half cycle that is the reverse voltage. Blinking).
  • Patent Document 1 discloses an organic EL lighting device (hereinafter simply referred to as an organic EL device) provided with a rectifier circuit.
  • the organic EL device described in Patent Document 1 suppresses flickering (flashing) by performing full-wave rectification using a rectifier circuit, despite using an AC power supply as an external power supply. Furthermore, it is said that the organic EL device can be miniaturized by providing the rectifier circuit integrally with the organic EL element.
  • a rectifier circuit is an essential configuration, and the structure must be complicated, and there is a complaint that the manufacturing process is excessively increased. That is, in the organic EL device, the organic EL element portion is formed by forming a predetermined layer on a glass substrate, whereas the rectifier circuit is manufactured by a separate manufacturing process. Therefore, a manufacturing process will increase excessively. Moreover, in the organic EL device described in Patent Document 1, a measure for attaching the rectifier circuit is required, and the structure becomes complicated. Furthermore, in the organic EL device described in Patent Document 1, since the rectifier circuit is an essential configuration, it is necessary to secure the installation position of the rectifier circuit separately from the organic EL element portion, and the organic EL device can be downsized. Have physical limitations.
  • the present invention is an organic EL device and an organic EL device that can emit light by alternating current, have a simple structure, have a small increase in manufacturing steps, and can reduce the overall shape.
  • An object is to provide a method for manufacturing an EL device.
  • the aspect of the invention for solving the above problems includes a power feeding part and an organic EL element forming part, and the organic EL element forming part has a plurality of unit EL elements formed on a single substrate, There are a plurality of series connection portions in which a plurality of the unit EL elements are electrically connected in series in the forward direction, and the plurality of series connection portions are electrically connected in parallel to the power feeding portion and connected in parallel.
  • the organic EL device is characterized in that the series connection portion includes a mixture of those having a polarity opposite to that of the power feeding portion.
  • the series connection parts of the unit EL elements are connected in parallel to the power supply part, and the series connection parts connected in parallel have the opposite polarity to the power supply part. That is, there is a series connection portion that is electrically reverse-parallel.
  • a plurality of series connection portions can be made to emit light alternately with an alternating voltage, and flickering (flashing) as a whole does not occur. That is, even if an AC voltage is applied to a plurality of series connection portions without being rectified, the whole can emit light to such an extent that the flicker is not noticed, so that a separate rectifier circuit is unnecessary. Therefore, the organic EL device of the present invention has a small increase in manufacturing steps, has a simple structure, and can be downsized.
  • One specific aspect of this aspect includes a unit EL element array in which a plurality of unit EL elements are apparently connected in series, and the unit EL element array is divided halfway to form a plurality of series connection portions. And the said serial connection part formed by dividing
  • unit EL element array in which a plurality of unit EL elements are apparently connected in series.
  • “apparently connected in series” means a structure that is electrically connected in series when only this is taken out alone.
  • a “unit EL element array” that is electrically connected in series when taken out as a single unit is formed, and this is electrically divided, and the divided individual parts are referred to as “series connection portions”. To function as.
  • the organic EL device be fed to the unit EL element array from the center side of the unit EL element array and from both ends of the unit EL element array.
  • center side means to exclude the end, and is not limited to the center.
  • power is supplied from the center side and both ends in a unit EL element array in which a plurality of unit EL elements are connected in series.
  • the unit EL element row can be electrically divided into two.
  • Each electrically divided portion also has a plurality of unit EL elements, and the plurality of unit EL elements are connected in series.
  • segmented and formed can be connected in antiparallel.
  • a forward series connection portion is formed in the unit EL element by one end portion and the central portion
  • a reverse series connection portion is formed in the unit EL element by the other end portion and the central portion. .
  • the present invention is excellent in versatility because it is possible to freely divide a unit EL element array formed on a single substrate only by providing a power feeding unit at a predetermined position.
  • the organic EL device has a plurality of unit EL element arrays in which a plurality of unit EL elements are apparently connected in series, and each of the unit EL element arrays is electrically connected to the power feeding unit as one serial connection unit. It may be provided with a configuration connected to.
  • one row of unit EL elements is functioned as one series connection unit.
  • an organic EL device may be used by combining the above-described configurations.
  • the composite organic EL device has a plurality of unit EL element rows in which a plurality of unit EL elements are apparently connected in series, and one or more columns of the unit EL element rows are halfway through the unit EL element rows.
  • a plurality of series connection portions are formed by division, and one or a plurality of rows of other unit EL element rows each form one series connection portion, and each of the series connection portions is electrically connected to the power feeding portion.
  • the organic EL device is connected in parallel to each other.
  • a reverse bias is applied to the other unit EL element. That is, a reverse bias can be individually applied to the unit EL elements in the middle part of the series connection part, and charges are not accumulated in each unit EL element.
  • the reverse bias means that a voltage is applied in the reverse direction to the PN coupling part inherently included in the unit EL element. That is, the voltage is applied so that the P side is negative and the N side is positive.
  • the life of the unit EL element can be extended.
  • Each unit EL element of the organic EL device has a part functioning as an anode and a part functioning as a cathode.
  • the unit EL element belonging to one series connection part In the series connection part connected in parallel, the unit EL element belonging to one series connection part and another part It is recommended that at least one of the parts functioning as the anodes of the unit EL elements belonging to the series connection part or the parts functioning as the cathodes is electrically connected.
  • a reverse bias can be applied to the unit EL element.
  • the organic EL device includes at least a first electrode layer, an organic light emitting layer, and a second electrode layer laminated on a base material, and the first electrode layer is separated into a plurality of small pieces by a first separation groove, whereby organic light emission
  • the layer is divided into a plurality of small light emitting regions by the light emitting separation grooves
  • the second electrode layer is separated into a plurality of small pieces by the second separation grooves
  • the unit EL element is composed of small pieces of layers.
  • the “unit EL element composed of a small piece of the first electrode layer, a small light emitting region, and a small piece of the second electrode layer” employed in the present configuration includes a first separation groove, a light emission separation groove, and a second separation. It is divided by a groove. In other words, since a plurality of unit EL elements can be provided simply by dividing a single base material with a configuration that allows easy processing of “grooves”, the productivity is excellent.
  • a part of a small piece of the second electrode layer belonging to at least one unit EL element extends and is connected to a small piece of the first electrode layer belonging to another unit EL element.
  • a part of the small piece of the second electrode layer extends and is connected to the small piece of the first electrode layer of another unit EL element means that the first separation groove is the second electrode layer. It indicates a state filled with a constituent conductor or the like.
  • This configuration is a unit EL element array in which unit EL elements are connected in series. That is, without preparing another conductor for connection, when laminating the second electrode layer, it is possible to provide the unit EL element row only by filling the first separation groove together. Are better.
  • the series connection portion of the organic EL device is configured such that a part of the small pieces of the second electrode layer belonging to the unit EL elements extend to the small pieces of the first electrode layer belonging to the adjacent unit EL elements, so that the adjacent unit EL elements are connected to each other.
  • a part of the small pieces of the second electrode layer belonging to the unit EL elements extend to the small pieces of the first electrode layer belonging to the adjacent unit EL elements, so that the adjacent unit EL elements are connected to each other.
  • a plurality of series connection portions are arranged in parallel on the substrate, and when the substrate is viewed in plan, the adjacent series connection portions are electrically forward with respect to the substrate. It is recommended that the small pieces of the second electrode layer belonging to the unit EL element of the adjacent series connection portion are electrically connected to each other.
  • a reverse bias can be applied to the unit EL element.
  • the organic EL device has at least two or more rows of first electrode layers on the substrate, and the two or more rows of first electrode layers are electrically insulated, and the first electrode layer in each row has organic light emission.
  • the first electrode layer is separated into a plurality of small pieces by the first separation groove, and the organic light emitting layer is divided into a plurality of small light emitting regions by the light emission separation groove, and the second electrode
  • the layers are separated into a plurality of pieces by a second separation groove, and the pieces of the second electrode layer are electrically connected to the pieces of the second electrode layer stacked on the first electrode layer in the adjacent row. It is desirable.
  • a reverse bias can be applied to the unit EL element.
  • the second electrode layer of the organic EL device is stacked over two or more rows of first electrode layers, and the second separation groove is continuous with a region extending over two or more rows of first electrode layers,
  • the second electrode layer is divided into a plurality of regions by the second separation groove, and each piece includes a first electrode layer in a row adjacent to a small piece of a second electrode layer including a row of the first electrode layer. It is recommended that two second electrode layer pieces be included.
  • a reverse bias can be applied to the unit EL element.
  • the second separation groove is constituted by a straight line at a shifted position and a line connecting it.
  • Another aspect of the present invention is a method for manufacturing an organic EL device according to any one of the above, wherein the first separation groove, the light emission separation groove, and the second separation groove are formed by irradiating a laser beam. It is recommended to do.
  • a method is employed in which the base material is masked with a metal mask in which a desired circuit is perforated to deposit a desired material.
  • a unit EL element in which a plurality of layers are stacked requires metal masks as many as the number of layers, which increases costs.
  • the first electrode layer, the organic light emitting layer, and the second electrode layer are laminated on the base material, and unnecessary portions of each layer are scribed with a laser beam to form the groove.
  • a metal mask which has been conventionally required is not necessary.
  • the number of manufacturing steps is small, the structure of the organic EL device itself is simple, and the size of the device can be reduced.
  • FIG. 2 is an electric circuit diagram showing the organic EL device of FIG. 1, wherein (a) shows the arrangement state of each element, and (b) is an equivalent circuit of (a). It is a top view of the organic EL device which displayed notionally the organic EL device concerning other embodiments of the present invention. It is front sectional drawing of the organic electroluminescent apparatus of FIG.
  • FIG. 5 is an electric circuit diagram showing the organic EL device of FIG. 4, where (a) shows an arrangement state of each element, and (b) shows a bridge circuit which is an equivalent circuit of (a).
  • FIG. 10 is an electric circuit diagram showing the organic EL device of FIG. 9. It is a top view which shows the 2nd electrode layer of the organic electroluminescent apparatus which concerns on further another embodiment of this invention, and shows the area divided by the groove
  • FIG. 14 is an electric circuit diagram showing the organic EL device of FIG. 13. It is a top view of the organic EL device which displayed notionally the organic EL device concerning other embodiments of the present invention notionally.
  • the organic EL device 1 shown in FIGS. 1 and 2 is provided with a power feeding unit 7 and an organic EL element forming unit 8 on a glass substrate (base material) 2.
  • the organic EL element forming portion 8 has a surface electrode layer 3 as a first electrode layer (anode), an organic light emitting layer 4 and a back electrode layer 5 as a second electrode layer (cathode) in order. It is the area
  • the surface electrode layer 3 is a layer composed of a transparent conductive film such as ITO (indium oxide) or ZnO (zinc oxide) which is conventionally known.
  • the surface electrode layer 3 is provided with a plurality of first separation grooves 11, and the surface electrode layer 3 is divided into surface electrode pieces 3 a to 3 e by the first separation grooves 11. A part of the organic light emitting layer 4 enters the first separation groove 11.
  • the surface electrode pieces 3a to 3e the surface electrode pieces 3a and 3e at both ends function as end-side power supply units 36 and 37, respectively.
  • the other surface electrode pieces 3b to 3d function as anode electrodes of the unit EL elements.
  • the organic light emitting layer 4 is a light emitting layer composed of a conventionally known hole injection layer, hole transport layer, light emitting layer, electron transport layer, electron injection layer and the like.
  • the organic light emitting layer 4 is provided with a plurality of light emitting separation grooves 12, and the organic light emitting layer 4 is divided into small light emitting regions 4 a to 4 e by the light emitting separation grooves 12. Note that a part of the back electrode layer 5 has entered the light-emitting separation groove 12.
  • the back electrode layer 5 is a layer made of a conventionally known conductive metal.
  • the back electrode layer 5 is provided with a plurality of second separation grooves 13, which are divided into back electrode pieces 5 a to 5 e by the second separation grooves 13.
  • Each of the back surface electrode pieces 5a to 5e functions as a cathode side electrode of the unit EL element.
  • the back electrode piece 5 b is located substantially at the center of the back electrode layer 5.
  • the back electrode piece 5b is located across the small light emitting regions 4b and 4c.
  • the center back electrode piece 5b is wider than the other back electrode pieces 5a, 5c, 5d.
  • the back electrode piece 5 b constitutes the central power supply unit 30.
  • the front electrode layer 3, the organic light emitting layer 4, and the back electrode layer 5 are divided by the first separation groove 11, the light emission separation groove 12, and the second separation groove 13, respectively.
  • the surface electrode pieces 3a to 3e, the small light emitting regions 4a to 4e, and the back electrode pieces 5a to 5e are divided.
  • the front electrode piece 3a, the small light emitting region 4a, and the back electrode piece 5a constitute a first unit EL element 20a that is one light emitting element having polarity. That is, the first unit EL element 20a emits light when energized with the front electrode piece 3a as an anode and the back electrode piece 5a as a cathode, and is turned off when energized in the reverse direction.
  • the surface electrode piece 3b, the small light emitting region 4b, and the back electrode piece 5b constitute a second unit EL element 20b.
  • the second unit EL element 20b emits light when energized using the front electrode piece 3b as an anode and the back electrode piece 5b as a cathode, and turns off when energized in the reverse direction.
  • the front electrode piece 3c, the small light emitting region 4c, and the back electrode piece 5c constitute a third unit EL element 20c
  • the front electrode piece 3d, the small light emitting region 4d, and the back electrode piece 5d are the first unit EL element 20c.
  • a 4-unit EL element 20d is configured.
  • the third unit EL element 20c and the fourth unit EL element 20d also emit light when energized with the surface electrode pieces 3c and 3d as the anode and the back electrode pieces 5c and 5d as the cathode, and turn off when energized in the opposite direction.
  • the first unit EL element 20a to the fourth unit EL element 20d are continuously arranged to form a unit EL element row 26.
  • the back electrode piece 5a serving as the cathode of the first unit EL element 20a extends to and is connected to the surface electrode piece 3b (first electrode layer) of the adjacent second unit EL element 20b via the light emitting separation groove 12a. That is, the back electrode piece 5a, which is the cathode of the first unit EL element 20a, is connected to the front electrode piece 3b, which is the anode of the second unit EL element 20b. Therefore, the first unit EL element 20a and the second unit EL element 20b are connected in series. That is, the first unit connection element 25a is formed by the first unit EL element 20a and the second unit EL element 20b.
  • the back electrode piece 5c as the cathode of the third unit EL element 20c is connected to the surface electrode piece 3d as the anode of the fourth unit EL element 20d. Therefore, the third unit EL element 20c and the fourth unit EL element 20d are connected in series. That is, the second unit connection element 25b is formed by the third unit EL element 20c and the fourth unit EL element 20d.
  • the back electrode piece 5d, which is the cathode of the fourth unit EL element 20d is connected to the surface electrode piece 3e, which is the end of the surface electrode layer.
  • the center back electrode piece 5b functions as the cathode of the second unit EL element 20b, but is also electrically connected to the surface electrode piece 3c as the anode of the adjacent third unit EL element 20c.
  • the back electrode piece 5b which is the cathode of the second unit EL element 20b, is electrically connected to the front electrode piece 3c, which is the anode of the third unit EL element 20c.
  • the element array 26 is taken out alone, four unit EL elements 20a, 20b, 20c, and 20d from the first unit EL element 20a to the fourth unit EL element 20d are connected in series. That is, the unit EL element array 26 is formed by apparently connecting four unit EL elements 20a, 20b, 20c, and 20d in series.
  • the glass substrate (base material) 2 is further provided with internal wirings 31, 32, 33 for connecting the power feeding unit 7 and the organic EL element forming unit 8. That is, two power supply terminals 15 and 16 are provided on the glass substrate (base material) 2, and the power supply unit 7 is configured by the two power supply terminals 15 and 16. Then, one terminal 15 of the power feeding unit 7 is connected to the central power supply unit 30 (the back electrode piece 5b of the second unit EL element 20b) provided in the approximate center of the back electrode layer 5 via the internal wiring 31. ing.
  • the other power supply terminal 16 of the power supply unit 7 is branched into internal wirings 32 and 33, and is connected to the end-side power supply units 36 and 37 (surface electrode pieces 3a and 3e at both ends) of the unit EL element array 26, respectively. It is connected. That is, the other power supply terminal 16 of the power supply unit 7 is connected to the surface electrode piece 3a and the surface electrode piece 3e which are anodes of the first unit EL element 20a. The surface electrode piece 3e is electrically connected to the cathode 5d of the fourth unit EL element 20d.
  • the organic EL device 1 is supplied with power from the power supply device 35 as shown in FIGS.
  • the power supply device 35 is an AC power supply, has two terminals 17 and 18, and generates AC between both terminals.
  • One terminal 17 of the power supply device 35 and the power supply terminal 15 of the organic EL device 1 are connected by an external wiring 21.
  • the other terminal 18 of the power supply device 35 and the power supply terminal 16 of the organic EL device 1 are connected by an external wiring 22.
  • the organic EL device 1 can be represented by a circuit symbol shown in FIG. 3A including the power supply device 35 and the external wirings 21 and 22.
  • the circuit shown in FIG. 3A can be represented by an equivalent circuit shown in FIG.
  • the unit EL element array 26 is electrically divided into two to form series connection portions 25a and 25b.
  • the series connection portions 25a and 25b are electrically connected in parallel and have different polarities.
  • a desired AC voltage is applied by the power supply device 35.
  • the surface electrode piece 3a side of the first unit EL element 20a becomes the plus side
  • the back electrode piece 5b of the second unit EL element 20b becomes the minus side.
  • a current flows in the forward direction in the small light emitting region 4a.
  • a current flows from the back electrode piece 5a of the first unit EL element 20a toward the front electrode piece 3b of the second unit EL element 20b, and a current also flows in the forward direction also in the small light emitting region 4b of the second unit EL element 20b. . Therefore, both the small light emitting region 4a and the small light emitting region 4b of the first series connection part 25a emit light.
  • the adjacent series connection portion 25b is turned off because the surface electrode piece 3c serving as the anode of the third unit EL element 20c is on the negative side and the back electrode piece 5d serving as the cathode of the fourth unit EL element 20d is on the plus side. It becomes a state.
  • the pair of series connection portions 25a and 25b can be made to alternately emit light with an AC voltage without using a rectifier circuit that has been conventionally required. According to the organic EL device 1 according to the embodiment of the present invention, since a rectifier circuit is unnecessary, it is possible to reliably reduce the size.
  • an organic EL device 1 ′ according to another embodiment of the present invention will be described in detail with reference to the drawings.
  • the same number is attached
  • the back electrode piece 5 a serving as the cathode of the first unit EL element 20 a and the back electrode piece 5 c serving as the cathode of the third unit EL element 20 c are connected by the internal wiring 34. ing.
  • the organic EL device 1 ′ can be represented by a circuit symbol shown in FIG. 6A including the power supply device 35 and the external wirings 21 and 22.
  • the circuit shown in FIG. 6A can be represented by an equivalent circuit shown in FIG.
  • the unit EL element array 26 is electrically divided into two to form series connection portions 25a and 25b.
  • the series connection portions 25a and 25b are electrically connected in parallel and have different polarities.
  • the series connection portions 25a and 25b are coupled by a wiring 34, and the unit EL elements 20a to 20d constitute a bridge circuit 40. That is, the unit EL element 20a is connected in parallel to the unit EL element 20d, and both have different polarities. Similarly, the unit EL element 20b is connected in parallel to the unit EL element 20c, and both have different polarities.
  • a reverse bias (reverse voltage) is applied to one second series connection portion 25b.
  • a forward voltage is applied to the first series connection portion 25a
  • the surface electrode piece 3a side of the first unit EL element 20a becomes the plus side
  • the back electrode piece 5b of the second unit EL element 20b becomes the minus side.
  • a current flows in the forward direction in the small light emitting region 4a.
  • a current flows from the back electrode piece 5a of the first unit EL element 20a toward the front electrode piece 3b of the second unit EL element 20b, and a current also flows in the forward direction also in the small light emitting region 4b of the second unit EL element 20b. . Therefore, both the small light emitting region 4a and the small light emitting region 4b of the first series connection part 25a emit light.
  • the adjacent series connection portion 25b is turned off because the surface electrode piece 3c as the anode of the third unit EL element 20c is on the negative side and the back electrode piece 5d as the cathode of the fourth unit EL element 20d is on the plus side. It becomes a state.
  • the back electrode piece 5a which is the cathode of the first unit EL element 20a
  • the back electrode piece 5c which is the cathode of the third unit EL element 20c
  • a reverse bias is individually applied to the third unit EL element 20c and the fourth unit EL element 20d constituting the series connection portion 25b.
  • a reverse bias is applied to each of the unit EL elements 20d and 20c in the other second series connection portion 25b.
  • the second series connection portion 25b that was previously turned off emits light
  • the first series connection portion 25a that was previously turned on is turned off.
  • a reverse bias is applied to each of the unit EL elements 20a and 20b constituting the first series connection portion 25a.
  • the pair of series connection portions 25 a and 25 b can alternately emit light with an AC voltage without using a rectifier circuit that has been conventionally required.
  • a rectifier circuit is not necessary, and thus downsizing can be reliably achieved.
  • the surface electrode layer 3 is laminated on the glass substrate 2.
  • a laser beam is irradiated from the laser device 50 to the surface electrode layer 3 to form a plurality of first separation grooves 11.
  • the surface electrode layer 3 is divided into surface electrode pieces 3a to 3e. Note that the interval between the first separation groove 11b and the first separation groove 11c sandwiching the second series connection portion 25b is wider than the other intervals, and the width of the surface electrode piece 3c constituting the second series connection portion 25b is as follows. , Wider than the other surface electrode pieces 3a, b, d.
  • the laser beam used in the laser device 50 is the second harmonic (532 nm) of YAG.
  • the organic light emitting layer 4 is deposited and laminated on the surface electrode layer 3 by a vacuum deposition method or the like.
  • the laser device 50 irradiates the organic light emitting layer 4 with a laser beam from the glass substrate 2 side to form a plurality of light emitting separation grooves 12.
  • the organic light emitting layer 4 is divided into small light emitting regions 4a to 4e.
  • the light emission separation groove 12b on the surface electrode piece 3c is wider than the other light emission separation grooves 12a, 12c, and 12d.
  • the back electrode layer 5 is laminated on the organic light emitting layer 4.
  • the laser device 50 irradiates the back electrode layer 5 with a laser beam from the glass substrate 2 side to form a plurality of second separation grooves 13.
  • the back electrode layer 5 is divided into back electrode pieces 5a to 5e. Note that the interval between the second separation groove 13b and the second separation groove 13c sandwiching the second unit EL element 20b is wider than the other intervals, and the width of the back electrode piece 5b constituting the second unit EL element 20b is: It is wider than the other surface electrode pieces 3a, c, d.
  • unit EL elements 20a to 20d and series connection portions 25a and 25b are formed on the glass substrate 2, and the organic EL element of the organic EL device 1 is formed.
  • the forming part 8 is completed. In the state where the internal wirings 31, 32, and 33 are not provided, the series connection portions 25a and 25b are connected in series to constitute the unit EL element row 26.
  • the above manufacturing method can form the two serial connection portions 25a and 25b only by changing the interval of irradiating the laser beam, and does not require masking of the base material.
  • the series connection portions 25a and 25b have been described as two unit EL elements 20 connected in series. However, in practice, a larger number of units are used.
  • the EL elements 20 are connected in series. Further, as shown in the equivalent circuit of FIG. 8, it is recommended that each unit EL element 20 is electrically connected in a ladder shape to form a bridge.
  • a plurality of unit EL elements 20 are arranged in series, fed from both ends and the center, and apparently the unit EL element array 26 in which the plurality of unit EL elements 20 are connected in series is electrically connected. It was divided into two rows of serial connection portions 25a and 25b. However, the present invention is not limited to the point where the single unit EL element row 26 is electrically divided into two series connection portions 25a and 25b, and may be divided into a plurality of units.
  • each unit EL element 60 forms a bridge circuit even if there is no internal wiring.
  • the width of each groove is omitted, and each groove is represented by a single line.
  • the power feeding unit 67 and the organic EL element forming unit 80 are formed on the glass substrate 45.
  • the organic EL element forming unit 80 is divided into two regions 51 and 52 with the buffer region 63 interposed therebetween, and a unit EL element array (first series connection unit) 41 is formed in one region 51, and the other region 52 is formed.
  • the unit EL element array (second series connection part) 42 is formed in the structure.
  • the buffer region 63 is a region partitioned by two buffer grooves 72a and 72b as shown in FIG.
  • Each of the two buffer grooves 72a and 72b is a groove formed in the surface electrode layer 73 (FIG. 10) as the first electrode layer, and is a groove extending in a direction perpendicular to the first separation groove 75 and the like described later. is there.
  • the surface electrode layer 73 is planarly divided by the two buffer grooves 72a and 72b, and the surface electrode layer 73 is between the two regions 51 and 52. It is divided and does not conduct.
  • the unit EL element row (first series connection portion) 41 formed in the two regions 51 and 52 and the unit EL element row (second series connection portion) 42 are in a relationship in which the left and right are interchanged. Yes, the whole polarity is reversed.
  • the first separation grooves 75a to 75f are formed in the surface electrode layer 73 as in the above-described embodiment.
  • the organic light emitting layer 76 light emitting separation grooves 62a to 62f are formed.
  • second separation grooves 80a to 80f and transition grooves 82a to 82c are provided in the back electrode layer 78 as the second electrode layer.
  • each of the grooves formed in the two regions 51 and 52 has only two central light emitting separation grooves (62a-62e, 62b-62f) linearly continuous. It straddles the two areas 51 and 52. That is, the light emission separation groove 62a and the light emission separation groove 62e communicate with each other in a straight line.
  • the light emission separation groove 62b and the light emission separation groove 62f communicate with each other in a straight line.
  • another light emission separation groove 62c is on the right side of the drawing
  • another light emission separation groove 62d is on the left side of the drawing.
  • the first separation grooves 75a to 75f are discontinuous between the two regions 51 and 52. That is, in the region 51 on the upper side of the drawing, the first separation groove 75a is on the left side of the light emission separation groove 62a on the left side of the center, but in the region 52 on the lower side of the drawing, the first separation groove 75e is on the right side of the light emission separation groove 62e on the left side of the center. There is. Similarly, in the region 51 on the upper side of the drawing, there is a first separation groove 75b on the left side of the light emission separation groove 62b on the right side of the center, but in the region 52 on the lower side of the drawing, the first separation is on the right side of the light emission separation groove 62f on the right side of the center. There is a groove 75f.
  • another first separation groove 75c is on the right side of the drawing, and in the region 52, another first separation groove 75d is on the left side of the drawing.
  • the second separation grooves 80a to 80f are also discontinuous between the two regions 51 and 52. That is, in the region 51 on the upper side of the drawing, there is the second separation groove 80b on the right side of the light emission separation groove 62a on the left side of the center, but in the region 52 on the lower side of the drawing, the second separation groove 80d on the left side of the light emission separation groove 62e on the left side of the center. There is. Similarly, in the upper region 51, there is a second separation groove 80c on the right side of the light emission separation groove 62b on the right side of the center. In the region 52 on the lower side of the drawing, the second separation is on the left side of the light emission separation groove 62f on the right side of the center. There is a groove 80e.
  • another second separation groove 80a is on the left side of the drawing, and in the region 52, another second separation groove 80f is on the right side of the drawing.
  • a transition groove 82 a is provided between the second separation groove 80 a in the upper region 51 and the second separation groove 80 d in the lower region 52.
  • a transition groove 82b is provided between the second separation groove 80b in the upper region 51 and the second separation groove 80e in the lower region 52.
  • a transition groove 82c is provided between the second separation groove 80c in the upper region 51 and the second separation groove 80f in the lower region 52.
  • the two unit EL element rows (series connection portions) 41 and 42 each include three unit EL elements 60. That is, the unit EL element row (first series connection portion) 41 includes a first unit EL element 60a, a second unit EL element 60b, and a third unit EL element 60c from the left side of the drawing (FIG. 10). It has an electrode piece 53, a small light emitting region 54, and a back electrode piece 55. More specifically, the first unit EL element 60a includes a front electrode piece 53a, a small light emitting region 54a, and a back electrode piece 55a. The second unit EL element 60b includes a front electrode piece 53b, a small light emitting region 54b, and a back electrode piece 55b. Similarly, the third unit EL element 60c includes a front electrode piece 53c, a small light emitting region 54c, and a back electrode piece 55c.
  • the back electrode piece 55a of the first unit EL element 60a and the front electrode piece 53b of the second unit EL element 60b are electrically connected via a part of the back electrode piece 55a that has entered the light emission separation groove 62a. ing.
  • the back electrode piece 55b of the second unit EL element 60b and the front electrode piece 53c of the third unit EL element 60c are electrically connected through a part of the back electrode piece 55b that has entered the light-emitting separation groove 62b. It is connected.
  • the back electrode piece 55c of the third unit EL element 60c is electrically connected to the terminal surface electrode piece 53d at the end via a part of the back electrode piece 55c that has entered the light-emitting separation groove 62c.
  • the first unit EL element 60a, the second unit EL element 60b, and the third unit EL element 60c are electrically connected in series.
  • the unit EL element row (first series connection portion) 41 the direction in which a current flows from the surface electrode piece 53a side of the first unit EL element 60a to the terminal surface electrode piece 53d side is the forward direction. That is, in the unit EL element row 41, the direction in which the current flows from the left side to the right side as shown by the arrow in FIG. 10 is the forward direction.
  • the polarity is reversed in another unit EL element row (second series connection portion) 42. That is, the other unit EL element row 42 is in a relationship in which the left and right sides of the unit EL element row 41 are reversed.
  • the unit EL element array (second series connection portion) 42 also includes a fourth unit EL element 60f, a fifth unit EL element 60g, and a sixth unit EL element 60h from the left side of the drawing, And a small light emitting region 54 and a back electrode piece 55.
  • the fourth unit EL element 60f includes a front electrode piece 53f, a small light emitting region 54f, and a back electrode piece 55f.
  • the fifth unit EL element 60g includes a front electrode piece 53g, a small light emitting region 54g, and a back electrode piece 55g.
  • the sixth unit EL element 60h includes a front electrode piece 53h, a small light emitting region 54h, and a back electrode piece 55h.
  • the connection relationship of the unit EL elements 60f to 60h is opposite to that of the unit EL element row (first series connection portion) 41, and the surface electrode piece on the left end of the drawing 53e is connected to the back electrode piece 55f of the fourth unit EL element 60f via the light emission separation groove 62d.
  • the surface electrode piece 53f that is the anode of the fourth unit EL element 60f is connected to the back electrode piece 55g of the fifth unit EL element 60g via the light emission separation groove 62e.
  • the surface electrode piece 53g serving as the anode of the fifth unit EL element 60g is connected to the back electrode piece 55h of the sixth unit EL element 60h via the light emission separation groove 62f.
  • the unit EL element array 42 has a connection relationship by the light emitting separation groove 62 opposite to that of the unit EL element array 41, and the direction of current flow from the right side to the left side of the drawing as indicated by the arrow in FIG. Forward direction.
  • the back electrode layer 78 of the organic EL device 47 is provided with the second separation grooves 80a to 80f and the transition grooves 82a to 82c.
  • the plane is divided into four areas A, B, C, and D as shown in FIG. That is, the area A is formed by the range surrounded by the outer line and the line composed of the second separation groove 80a, the transition groove 82a, and the second separation groove 80d.
  • Area B is defined by a range surrounded by a line composed of the second separation groove 80a, the transition groove 82a, and the second separation groove 80d, and a line composed of the second separation groove 80b, the transition groove 82b, and the second separation groove 80e. Is formed.
  • the area C is defined by the range surrounded by the line constituted by the second separation groove 80b, the transition groove 82b, and the second separation groove 80e, and the line constituted by the second separation groove 80c, the transition groove 82c, and the second separation groove 80f. Is formed.
  • An area D is formed by a range surrounded by a line constituted by the second separation groove 80c, the crossing groove 82c, and the second separation groove 80f and a line constituted by the outline.
  • the back electrode piece 55a of the first unit EL element 60a and the back electrode piece 55g of the fifth unit EL element 60g are in the same area B, and both are electrically connected. Therefore, the back electrode piece 55a that is the cathode of the first unit EL element 60a and the back electrode piece 55g that is the cathode of the fifth unit EL element 60g are connected by the back electrode layer 78 in the area B. Similarly, the back electrode piece 55b of the second unit EL element 60b and the back electrode piece 55h of the sixth unit EL element 60h are in the same area C, and both are electrically connected.
  • the back electrode piece 55b which is the cathode of the second unit EL element 60b
  • the back electrode piece 55h which is the cathode of the sixth unit EL element 60h
  • the glass substrate (base material) 45 is provided with two power supply terminals 65 and 66, and the two power supply terminals 65 and 66 constitute a power supply unit 67.
  • the two power supply terminals 65 and 66 are connected to the surface electrode pieces 53a, 53d, 53e, and 53h on both ends of the unit EL element rows 41 and 42 by the internal wirings 68 and 70, respectively.
  • An equivalent circuit of the organic EL device 47 of the present embodiment is as shown in FIG. Therefore, a reverse bias is applied to each of the unit EL elements 60f, 60g, and 60h in the second unit EL element array 42 while one of the first unit EL element arrays 41 emits light.
  • the second unit EL element row 42 previously turned off emits light
  • the first unit EL element row 41 previously turned off is turned off.
  • a reverse bias is applied to each of the unit EL elements 60a, 60b, 60c constituting the first unit EL element array 41.
  • two unit EL element rows can be formed only by changing the interval of laser beam irradiation.
  • the buffer region 63 it becomes easy to form a groove by a laser beam. That is, in the organic EL device 47 of this embodiment, the groove positions are different between the two regions 51 and 52. Therefore, the groove cannot be cut over both ends of the glass substrate 45.
  • a method of covering the other region with an opaque member while forming a groove in one region is also effective.
  • the space between the other region 52 and the laser device is covered with an opaque plate.
  • a plurality of unit EL element rows can be formed by forming a groove using a laser beam.
  • the second separation grooves 80a to 80f provided in the unit EL element rows 41 and 42 are straight lines at different positions.
  • the second separation groove 80a provided in the unit EL element row 41 and the second separation groove 80d provided in the unit EL element row 42 are located at positions shifted from each other by the crossing groove 82a. 11 and 12, according to the equivalent circuit of FIG.
  • the back-side electrode piece 55g which is the N side of the unit EL element 60g which is a PN bond on the side of the row 42 is connected by the back-side electrode layer 78 in the area B.
  • the back-side electrode piece 55b on the N side of the unit EL element 60b that is the PN coupling on the unit EL element row 41 side and the back-side electrode piece 55h on the N side of the unit EL element 60h that is the PN coupling on the unit EL element row 42 side. Are coupled by the back electrode layer 78 in the area C.
  • the present invention is not limited to the one having such broken line-like second separation grooves 80a to 80f and the like, and as shown in FIG. 13, the second EL elements arranged in the unit EL element rows 41 and 42 are provided.
  • the separation grooves 80a to 80f may be connected by a straight line.
  • the plane of the back electrode layer 78 is divided into four areas of E, F, G, and H as shown in FIG. 13 by the second separation grooves 80a to 80f.
  • An equivalent circuit of the organic EL device 49 of the present embodiment is as shown in FIG.
  • the back-side electrode piece 55 f on the N side of the unit EL element 60 f that is a PN bond is connected by the back-side electrode layer 78 in the area F.
  • the back-side electrode piece 55b on the N side of the unit EL element 60b that is the PN coupling on the unit EL element row 41 side and the back-side electrode piece 55g on the N side of the unit EL element 60g that is the PN coupling on the unit EL element row 42 side. are combined by the back electrode layer 78 in the area G.
  • a back electrode piece 55c on the N side of the unit EL element 60c that is a PN coupling on the unit EL element row 41 side, and a back electrode piece 55h on the N side of a unit EL element 60h that is a PN bond on the unit EL element row 42 side Are coupled by the back surface electrode layer 78 in the H area.
  • each unit EL element 60 forms a bridge circuit, and a reverse bias is applied to the unit EL elements 60 constituting the serial connection portion (unit EL element rows 41 and 42) on the light-off side. Is applied.
  • a unit EL element array 26 in which a plurality of unit EL elements 20 are apparently connected in series is electrically divided into two series connection portions 25a and 25b.
  • the configuration has been described, and in the second embodiment, the configuration in which the unit EL element rows 41 and 42 function as a series connection unit as illustrated in FIGS. 9 and 10 has been described.
  • the unit EL element row 26 is electrically divided to form the series connection portions 25a and 25b.
  • FIG. 15 shows an example of this configuration. Since the configuration of each part of the organic EL device 84 of the present embodiment is the same as that of the previous embodiment, redundant description is omitted by assigning the same number to the same part.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

Le but de l'invention est de fournir un dispositif EL organique qui puisse émettre de la lumière à l'aide d'un courant alternatif, qui possède une structure simple, qui présente peu d'augmentation des processus de fabrication, et qui permette de réduire la taille de la forme globale, et aussi de fournir un procédé de fabrication de ce dispositif EL organique. Le dispositif EL organique est caractérisé en ce qu'il comprend une section d'alimentation électrique et une section de formation d'élément EL organique dans laquelle plusieurs éléments EL unitaires sont formés sur un seul substrat, plusieurs parties de connexion série comprenant chacune plusieurs éléments EL unitaires connectés électriquement en série dans une direction avant sont présentes, lesquelles parties de connexion série sont connectées électriquement en parallèle à la section d'alimentation électrique, et lesquelles parties de connexion série connectées en parallèle comprennent des parties de connexion série avec des polarités inversées connectées à la section d'alimentation électrique.
PCT/JP2012/050024 2011-01-07 2012-01-04 Dispositif el organique et procédé de fabrication de dispositif el organique Ceased WO2012093671A1 (fr)

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JP2012551863A JP6000127B2 (ja) 2011-01-07 2012-01-04 有機ｅｌ装置
US13/978,387 US8921846B2 (en) 2011-01-07 2012-01-04 Organic EL device and method for producing organic EL device
EP12732156.0A EP2663163B1 (fr) 2011-01-07 2012-01-04 Dispositif el organique et procédé de fabrication de dispositif el organique

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WO2018110491A1 (fr) * 2016-12-13 2018-06-21 パイオニア株式会社 Dispositif électroluminescent
WO2020170399A1 (fr) * 2019-02-21 2020-08-27 シャープ株式会社 Élément électroluminescent et dispositif d'affichage

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WO2013103093A1 (fr) * 2012-01-05 2013-07-11 株式会社カネカ Dispositif électroluminescent organique et son procédé de fabrication
US11031579B2 (en) * 2017-10-06 2021-06-08 Lumileds Llc Method of manufacturing an OLED device
CN110148593B (zh) * 2019-05-08 2020-09-08 深圳市华星光电半导体显示技术有限公司 有机电致发光器件

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WO2020170399A1 (fr) * 2019-02-21 2020-08-27 シャープ株式会社 Élément électroluminescent et dispositif d'affichage

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US8921846B2 (en) 2014-12-30
JP6000127B2 (ja) 2016-09-28
EP2663163A4 (fr) 2017-10-25
EP2663163B1 (fr) 2020-02-26
EP2663163A1 (fr) 2013-11-13
US20130285033A1 (en) 2013-10-31

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